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Phytoestrogen content of
foods--a compendium of literature values.
Nutr Cancer 1996;26(2):123-48
Reinli K, Block G.
Public Health Nutrition Program, University of California at Berkeley 94720,
USA.
Plant compounds with estrogenic activity may play a role in cancer prevention,
moderation of menopausal symptoms, and other health effects. To facilitate
research on these possible actions, the literature was reviewed for quantitative
data on the levels of known phytoestrogens (daidzein, genistein, coumestrol,
formononetin, and biochanin A) in food plants. For comparative purposes, all
phytoestrogen levels were recalculated on a wet weight basis. Details on
analytic procedures are given as well. High-performance liquid chromatography
was the method most often used to analyze these compounds in foods. Most
significant sources of isoflavone and coumestan phytoestrogens include soybeans,
soy flour, soy flakes, isolated soy protein, traditional soy foods such as tofu
and soy drinks, second-generation say foods, sprouts, and other legumes.
Finally, medians among reported values of phytoestrogen content are provided for
some of the most commonly eaten foods with quantitative data available. These
may be used to calculate dietary intake of daidzein, genistein, coumestrol,
formononetin, and biochanin A.
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